Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 631a159fa34bdd03…

MALICIOUS

Office (OLE)

6.5 KB First seen: 2017-06-27
MD5: 52ec59ccdc1a499696b9f5f25049417a SHA-1: 001d03a408f6b715ebe048d8aee3249e7e3db74c SHA-256: 631a159fa34bdd037b03d599abe22526bba886e06a2f5793b4028339a5b00cd2
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample exhibits characteristics of a legacy macro virus, specifically identified by 'RSN MACRO VIRUS' markers within its document body and a heuristic firing for OLE_LEGACY_WORDBASIC_MACRO_VIRUS. The presence of AUTOOPEN and AUTOSAVE macros suggests an intent to execute malicious code automatically upon opening or saving the document. This points to a classic macro-based attack vector, likely delivered as a spearphishing attachment.

Heuristics 2

  • ClamAV: Win.Trojan.TWNO-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.TWNO-2
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.

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